PermissionError in windows during the build

[fresh-ter]

Input:

$ python Freezer/freezer.py mad-penguins.tk.freezer build

Output:

Traceback (most recent call last):
  File "Freezer/freezer.py", line 285, in <module>
    main()
  File "Freezer/freezer.py", line 282, in main
    f.build()
  File "Freezer/freezer.py", line 251, in build
    shutil.copytree(pathToStatic, pathToBuild+'/')
  File "C:\Python37\lib\shutil.py", line 321, in copytree
    os.makedirs(dst)
  File "C:\Python37\lib\os.py", line 221, in makedirs
    mkdir(name, mode)
PermissionError: [WinError 5] Access is denied: 'build/'